Clarence warner



C. WARNER ELECTRICAL APPARATUS Filed Nov. 15, 1923 May- .10, 1927.

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Patented May 10, 1927.

UNITED STATES PATENT OFFICE.

CLARENCE WARNER, OF DAYTON, OHIO, ASSIGNOR 'I'O DELCO-LIGHT COMPANY, OFDAYTON, OHIO, A CORPORATION OF DELAWARE.

ELECTRICAL APPARATUS.

Application tiled November 15, 1923.

'lhis invention relates to cooling apparatus for electric motors, andhas for its object to secure the greatest possible cooling efiircin-.ywith the least number of parts compactly arranged.

Further objects and advantages of the present invention will be apparentfrom the following description, reference being had to the accompanyingdrawings, wherein 'a preferred form of embodiment of the presentinvent-ion is clearly shown.

In the drawings:

Fig. 1 is a view partly in section and partly inelcvation of an electricmotor embodying the present invention.

Fig. 2 is a vertical sectional view of the cooling fan.

Fig. 3 is a view of the fan looking in the direction of the a-rron A inFig. l.

Fig. 4 is a fragmentary View in elevation looking in the direction ofarrow 4 in Fig. l.

Fig. 5 is a sectional viewtaken on line 5,-5 of Fig. l. i

Referring to the drawings, a flanged inotor frame 20 is adapted to besecured to a flanged wall of a gear housing or other support by bolts76. Frame 20 is provided with a series of spaced ribs 21, -preferablyeight in number, extending inwardlvfronil said framev and having noseportions 23. Field laminations Q4 and end plates 25 and QGare'supportedby ribs 21 andare held in position thereon by clamping ring 27 bearingagainst end plate "26 andV being secured to the ribs 2l byscrews 28.AEnd plate 25 bears against thenosev portions. Field coils 30 areprovided about the field laminations 24 in the usual manner.

A motor shaft 35 ext-ends from the gear housing through an opening 77 inwall 75 thereof into t-he motor frame 20, and supports between the fieldcoils 30 and laminations 24, an armature 36-and a commutator` 37. Ananti-friction bearing for motor shaft 35 is supported withinA theretaining portion 78 of wall 75.` the inner race of said bearingabutting against a collar 38 on shaft 2i?, and tht.l outer race thereofabutting a spacing ril'ig 79 in retaining portion 78. Armature 36 ismounted on a Sleeve 40 which is removable from .shaft Sleeve 40 isthreaded as at 4l for receiving a nut 4Q which together with washer 43clamps the `corc of the armature against the shoulder 44 on sleeve 40. Awasher 45 provided with Serial No. 675,003.

flats on its inner periphery is received by a. reduced end portion 46 ofmotor shaft 35 which is also provided with corresponding .v flats.laarsA on washer 4o engage slots in the end of the Heere, thus forn'xinga driving connection between. sleeve 40 and shaft 35.

A peripheral disch: rge fan 100, provided with aA hub 101 and having acentral intake portion 102 and angularly disposed vanes 103, is mountedon the motor shaft 35 between the anti-friction bearing and the armature36, one end of the hub 101 bearing against the inner race of thebearing, and the other end oflhub. bearing against' one end of sleeve40.-'` A nut 47 having threaded engagementiwith the end-bf motor shaftcauses lock washer'48 to bear against washer 45, thus clampingthe fanhub 101 between the anti-friction bearing and the sleeve 40` and causingfan to -rotate with sleeve 40 or openingl connecting with-.the passagesbetween-f. the ribs- 2l .inside the 'motor frame 20.

-:End-frame'60, provided with louvres 90` formingopeningsGQ, is securedto frame 9.0 b v-.non-loosablebolts 63,-. andJ provides an enclosure-forgthe commutator -end of the armatureu.- Brush mounting plate 64 issecured to the frame 20 by screws. (not shown) and-is provided with acentral circular opening .65 through: which the '.coinmutator 37;-extends.-i

Fla-nged wall -75-is provided with a series of spaced air inletlopenings'80 in the lower 100 portion thereof.l Tall 75 is, also provided with anannularrecess 81 forreceving a circular wall 82 of a cu -shaped frameorbaffle 83. which is secure thereto by screws 84. fall 82 hea-rs againstthe outer race of 105 the anti-friction bearing and serves as a retainertherefor. Frame 83 is provided with alined openings 85 and 86 throughwhich the sha-ft 35 and fan hub 101 pass,

there being a slight clearance between the opening and the hub 101, theopening SG being somewhat larger than the outside diameter of hub '101to provide an air inlet for fan 100. yall S7 of frame 83, which is.spaced from wall 82 by spacers 87,iforms a [.iassage S8 which connectsthe air inlet. openings S() with the intake portion 1.02 of fan louthrough opening 86 in wall S7. \/Vall Si prevents the peripherallydischarged air Vtroni fan 10() escaping back through openings 80, andserves to deflect the discharged air along the'field coils 30. Duct 90in Wall T5 cooperates with duct 91 in wall 82 to provide an oil returnfrom the anti-friction bewaring and the tar huh lill to the gearhousing.

illmlc of operation.

Upon operation o't' the fan 10() in a councrclocltwise direction, asvviewed in Fig. 3, air will be drawn through openings S0 into passage 8S.through opening S6 in wall 87 to the intake. portion 102 of fan 100. Theair will be swirled about the central portion 102 and deflected towardthe periphery of the fan by the side surfaces 104 of the angularlydisposed vanes 93. Air emerging from fan 100 will be deflected alongcoils 30 by wall ST and pressure vwill be built up within the motorframe 20. AAir will`be. forced around one end of coils 30 and throughthe passages between the ribs 21, about the opposite ends of coils 30,through opening 6:3 in brush plate 64 and through openings 62 in endframe 60 to the outside atmosphere. Some air will be forced out throughthe opening 3l which connects the passages between ribs 2l adjacentthetopof frame Q0, as viewed in Fig. 1. This forced current of airflowing throughlthe motor frame Q0 will tend to keep cool the coils 30and field laminations 24,'-as well as the commutator 37 and the brushstructure (not shown lVhile the form of embodiment of the presentinvention as herein disclosed, constitutes a preferred-form, it is to beunderstood that other forms might be adopted, all coming within thescope of the claims which follow.

lVhat is claimed is as follows:

1. An elect-ric motor comprising, in combination, a motor field frame, amotor shaft and an armature7 a supporting frame for said motor frameprovided with air inlet openings, a bearing for said shaft mountedwithin the supporting frame, a peripheral discharge fan mounted on theshaft between the bearing and armature, a baille between the fan andsupporting frame serving as a retainer for said bearing and providing apassage from the air inlet openings to the fan intake.

2. Au electric motor comprising, iu coinbiuation, a motor shat't, a.sleeve removably supported upon the shaft, an armature core mounted or.thc sleeve, means Jfor securing the core to said sleeve, a bearing forthe shaft havingr a portion rotatable with the shaft, a fan-looselymounted on the shaft. and means for locking the sleeve to the shaft andfor clamping the fan between the sleeve and the rota-table portion ofthe bearing.

3. An electric motor comprising in combination, a supporting frame, abearingr in said frame, a shaft. journaled in said bearing, a coolingfan for the motor carried by said sha ft, and means for securing thebearing in position including an air directingr battle.

Al. An electritmotor comprising in conibination, a supporting framehaving a shoulder,- a bearing in said frame havin r inner and outerraces, said outer race abuttingr the shoulder, a shaft secured to theinner race, a cooling fan for the motor carried by said shaft, and meansfor securing the bearing in position including an air directing' baillefor clamping said 'outer race againstthe shoulder.

An electric motor comprising in coinbination7 a field frame carryingwindings which extend longitudinally beyond one end of the frame, acup-shaped 'end frame in. closing the field. windings and providingr abearing recess centrally thereof, and having openings in the sidethereof," a shaft bearing located within said recess, a shaft supportedby said bearing, a cup-shaped member located within the end frame andclosely adjacent the eld windings and having end and side walls spacedfrom the end and side walls of the 'end frame, and having an. openingfor receiving the sha'z: a fan enclosed by said member and locatedadjacent the.central opening thereof, and a bearing-retaining plateintegral with the cup-shaped member and spaced from the end wall thereofto space the latter from the end wall. of-the end frame when saidretaining plate is secured to the end wall o the end frame member.

In testimony whereof I hereto aflix my signature.

CLARENCE 4VARNER.

